87 lines
2.5 KiB
C
87 lines
2.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/******************************************************************************
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* Guest OS interface to ARM Xen.
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*
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* Stefano Stabellini <stefano.stabellini@eu.citrix.com>, Citrix, 2012
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*/
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#ifndef _ASM_ARM_XEN_INTERFACE_H
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#define _ASM_ARM_XEN_INTERFACE_H
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#include <linux/types.h>
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#define uint64_aligned_t uint64_t __attribute__((aligned(8)))
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#define __DEFINE_GUEST_HANDLE(name, type) \
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typedef struct { union { type *p; uint64_aligned_t q; }; } \
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__guest_handle_ ## name
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#define DEFINE_GUEST_HANDLE_STRUCT(name) \
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__DEFINE_GUEST_HANDLE(name, struct name)
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#define DEFINE_GUEST_HANDLE(name) __DEFINE_GUEST_HANDLE(name, name)
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#define GUEST_HANDLE(name) __guest_handle_ ## name
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#define set_xen_guest_handle(hnd, val) \
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do { \
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if (sizeof(hnd) == 8) \
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*(uint64_t *)&(hnd) = 0; \
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(hnd).p = val; \
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} while (0)
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#define __HYPERVISOR_platform_op_raw __HYPERVISOR_platform_op
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#ifndef __ASSEMBLY__
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/* Explicitly size integers that represent pfns in the interface with
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* Xen so that we can have one ABI that works for 32 and 64 bit guests.
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* Note that this means that the xen_pfn_t type may be capable of
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* representing pfn's which the guest cannot represent in its own pfn
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* type. However since pfn space is controlled by the guest this is
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* fine since it simply wouldn't be able to create any sure pfns in
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* the first place.
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*/
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typedef uint64_t xen_pfn_t;
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#define PRI_xen_pfn "llx"
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typedef uint64_t xen_ulong_t;
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#define PRI_xen_ulong "llx"
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typedef int64_t xen_long_t;
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#define PRI_xen_long "llx"
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/* Guest handles for primitive C types. */
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__DEFINE_GUEST_HANDLE(uchar, unsigned char);
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__DEFINE_GUEST_HANDLE(uint, unsigned int);
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DEFINE_GUEST_HANDLE(char);
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DEFINE_GUEST_HANDLE(int);
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DEFINE_GUEST_HANDLE(void);
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DEFINE_GUEST_HANDLE(uint64_t);
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DEFINE_GUEST_HANDLE(uint32_t);
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DEFINE_GUEST_HANDLE(xen_pfn_t);
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DEFINE_GUEST_HANDLE(xen_ulong_t);
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/* Maximum number of virtual CPUs in multi-processor guests. */
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#define MAX_VIRT_CPUS 1
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struct arch_vcpu_info { };
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struct arch_shared_info { };
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/* TODO: Move pvclock definitions some place arch independent */
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struct pvclock_vcpu_time_info {
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u32 version;
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u32 pad0;
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u64 tsc_timestamp;
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u64 system_time;
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u32 tsc_to_system_mul;
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s8 tsc_shift;
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u8 flags;
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u8 pad[2];
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} __attribute__((__packed__)); /* 32 bytes */
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/* It is OK to have a 12 bytes struct with no padding because it is packed */
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struct pvclock_wall_clock {
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u32 version;
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u32 sec;
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u32 nsec;
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u32 sec_hi;
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} __attribute__((__packed__));
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#endif
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#endif /* _ASM_ARM_XEN_INTERFACE_H */
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